Decades: 1770s 1780s 1790s 1800s 1810s - 1820s - 1830s 1840s 1850s 1860s 1870s
Years: 1817 1818 1819 1820 1821 - 1822 - 1823 1824 1825 1826 1827
March 30 - Florida becomes a United States territory.
May 24 - Battle of Pichincha: Simón Bolívar secures the independence of Quito.
July 8 - Chippewas turn over huge tract of land in Ontario to the United Kingdom.
September 7 - Brazil declares its independence from Portugal
September 16 - George Canning appointed British foreign secretary.
October 12 - Pedro I of Brazil declared constitutional emperor of the Brazilian Empire
October-December - Congress of Verona at which Russia, Austria and Prussia approve French intervention in Spain
December 1 - Dom Pedro is crowned as Emperor of Brazil.
Hieroglyphs deciphered by Thomas Young and Jean-François Champollion using the Rosetta Stone.
Galileo Galilei's Dialogue taken off the Index librorum prohibitorum, the Roman Catholic Church's list of banned books.
Ashley's Hundred leave from St. Louis setting off a major increase in fur trade.
Year in topic
1822 in literature
1822 in science
January 4 - Georg Büchmann, philologist (+ 1884)
January 6 - Heinrich Schliemann, German archaeologist
January 28 - Alexander Mackenzie, second Prime Minister of Canada
February 16 - Sir Francis Galton, explorer, biologist (+ 1911)
April 3 - Edward Everett Hale, writer, (+ 1909)
May 26 - Edmond de Goncourt, writer (+ 1896)
July 18- Her Royal Highness Princess Augusta of Cambridge
December 10 - César Franck, composer and organist (+ 1890)
Gregor Mendel, geneticist
Charles A. Alexander, Victorian architect
July 7 - Percy Bysshe Shelley, poet
August 12 - Robert Stewart, Viscount Castlereagh, British foreign secretary, cut his own throat
Ali Pasha, Albanian ruler under the Ottoman Empire
Heads of states
Ottoman Empire - Mahmud II Sultan of the Ottoman Empire (1808-1839)
Prussia - Frederick William III King of Prussia (1797-1840)
Russia - Alexander I Tsar of Russia (1801-1825)\n